Years ago, Nassau had a signed county route system, just like Suffolk. It was extremely extensive. The numbers ranged from 1 to 191, with very few numbers being skipped. The 1962 version of the Official Map of Nassau County showed the proposed road network for Nassau. A copy of this map is available for viewing at the Nassau County Planning Commission, although it is very large and therefore not reproducible. The map shows several unbuilt proposed state routes, including the Caumsett Parkway and sections of the Bethpage Parkway, the Nassau Expressway (NY 878), and the Seaford-Oyster Bay Expressway (NY 135). However, every county route shown on the map was built and most are still under the jurisdiction of the county. It is unknown whether signage was posted for all of the county routes only for a subset of them. The routes were marked with orange and blue pentagonal shields. Later, the federal government set standards for county route signage and Nassau's signs were not compliant. Since Nassau did not have adequate money to purchase the new signs necessary to come into compliance, the signs were all removed and all Nassau county routes became secret designations. The system has changed substantially in the time since. Many roads under the jurisdiction of the county no longer have route numbers. Only few routes, specifically CR 2, CR 26, CR 27, CR 63, CR 105, and CR 181 have not been shortened, lengthened, or otherwise modified since 1962.

Back Road no longer exists. Mill Street has been renamed Pulaski Street.

Syosset-Woodbury Road

From:

Cold Spring Road (CR 18) in Syosset

To:

Woodbury Road (CR 12) in Woodbury

North Jerusalem Road

From:

Jerusalem Avenue (CR 105) in East Meadow

To:

Wantagh Avenue (NY 115) in Levittown

Note:

NY 115 was decommissioned in 1972.

Brookside Avenue

From:

Merrick Road (CR 27) in Freeport

To:

Nassau Road (CR 7) in Baldwin

Bryant Avenue, Glen Cove Avenue

From:

Bryant Avenue (CR 7) and Intervale Avenue (CR 7) in Roslyn

To:

Glen Cove Avenue (CR 1) and Back Road (CR 1) in Roslyn

Note:

Intervale Avenue has been renamed Glenwood Road.

Duffy Avenue

From:

Old Country Road (CR 25) in Hicksville

To:

Newbridge Road (NY 106) in Hicksville

Stuart Avenue

From:

Elmont Road (CR 99) in Elmont

To:

Central Avenue (CR 20) in Elmont

Central Avenue, Merritts Road

From:

Hicksville Road (NY 107) in Levittown

To:

Hempstead Turnpike (NY 24) in Farmingdale

Warwick Boulevard

From:

Island Park village line

To:

Long Beach Road (CR 1A) in Island Park

Mill Road, Beltagh Avenue

From:

Merrick Road (CR 27) in Wantagh

To:

Bellmore Avenue (CR 26) in Bellmore

Note:

Mill Road has been renamed Old Mill Road.

Wantagh Avenue

From:

Hempstead Turnpike (NY 24) in Levittown

To:

Hicksville Road (NY 107) in Levittown

Note:

In 1962, Wantagh Avenue was designated NY 115 from Merrick Road to NY 107. The northernmost section was locally maintained as CR 189. Since then, NY 115 was decommissioned. The entirety of Wantagh Avenue is currently a county route.